Lasting attachment for stapling machines



March 2 1926.

A. H. PRENZEL LASTING ATTAQHMENT FOR STAPLING MACHINES 2 SheetsSheet 1 Filed July 9, 1925 INVENTOR 3 1 1711177131 T8102 6Z- ATTORNEYS March 2 1926. 1,575,279

A. H. F'RENZEL LASTING ATTACHMENT FOR STAPLING MACHINES Filed July 9, 1925 2 Sheets-Sheet 2 INVENTOR #06 176! fiszvzez,

ATTORNEYS Patented Mar, 2,, i926.

UNITED STATES ADAM H. PRENZEL, OF HALIFAX, PENNSYLVANIA.

LASTING ATTACHMENT FOR STALPLING MACHINES.

Application filed July 9, 1925.

To all whom it may concern:

Be it known that I, ADAM H. Pnnnznnfa citizen of the United States, and resident of Halifax, in the county of Dauphin and State of Pennsylvania, have invented cer tain new and useful Improvements in Lasting Attachments for Stapling llachines, of which the following is a specification.

This invention relates to improvements in stapling machines, and it consists of the constructions, combinations and arrangements herein described and claimed.

An object of the invention is to provide an attachment for stapling machines, so arranged that the upper is worked or drawn over the last immediately prior to the driving of a staple or other temporary fastening means, use being made of the power imparted to the rocker and staple guide in stapling operations, thereby combining the principal function of a lasting machine with that of the stapling machine.

Other objects and advantages appear in the following specifications, reference being had to the accompanying drawings, in which Figure 1 is a side elevation of enough of a stapling machine to illustrate the embodiment of the lasting attachment.

Figure 2 is a side elevation of the lasting attachment as seen from the opposite side of the stapling machine.

Figure 3 is a sectional view of the staplingv machine showing a sole flange inplace upon the anvil and the upper in place upon the lasting fingers.

Figure 4 is a detail sectional view on the line 4 4 of Figure 3 showing how the upper is supported by the lasting fingers.

Figure 5 is a detail side elevation of the staple guide and anvil of the stapling ma chine, illustrating the relationship of the lasting fingers.

Figure 6 is a sectional view showing the staple guide moved down and illustrating the action wherein the upper is drawn tightly upon the last.

Figure 7 is a detail sectional view on the line 7-7 of Figure 6, showing how the divider ooacts with the lasting fingers in making a tight fold in the upper.

Figure 8 is'a detail plan view of the lasting fingers. V

Figure 9 is a detail side elevation illustrating how an adjustment of the lasting fingers produces a more pronounced foldtightening or drawing action of the divider.

Serial No. 42,543.

This invention is an improvement on the stapling machine disclosed in my co-pending application filed August 21, 1922, Serial #583,322, and is designed with a view of being cooperatively used in connection with the machine for molding insole flanges de-v scribed in my co-pending application for Letters Patent filed July 9, 1925, Serial Number 412,545 and handling the particular insole produced by said machine, said insole being described in my co-pending application for Letters Patent filed July 9, 1925, Serial No. 42,544. The stapling machine in my (impending application Serial Number 583,322 has incorporated therein a pair of rigidly supported lasting fingers with which a fold controller on the staple guide cooperates for the purpose of producing folds in the upper preparatory to the driving of the staple. The improvementherein disclosed provides for a yieldable mounting of the lasting fingers and in addition to the fold controller there is provided a divider upon the rocker intended to ooact directly with the lasting fingers to produce a tight fold and to stretch the upper tightly upon the last.

Briefly described, those parts of the stapling machine necessarily described and illustrated to convey an understanding of the lasting attachment comprise a' connecting rod 2 which is capable of operation by a suitable treadle (not shown). The upper end of the connecting rod is pivotally joined at 3 to an actuating link 4 which, in turn, is pivoted at 5 to a dog 6 having a pivotal mounting at 7 to a portion of the frame 8. The frame is suitably mounted upon a standard (not shown).

A rocker arm, pivoted at 12 to the actuating link a depresses the rocker 1 1 through its pivotal connection 15 upon each operation of the connecting rod 2, and necessarily of the treadle to which it is joined at the bottom. The rocker is suitably pivoted upon the frame. The driving arm 17 is pivoted at 18 to a link 19 which in turn is pivoted at 20 to the frame, A depression of the treadle causes the depression of the rocker l4, and simultaneously therewith causes the disengagement of the dog. 6 from the clutch 21 and the heel 22 from the recess 23 in the hub of an eccentric 2 As the shaft 25 revolves continuously while the machine is in operation, the disengagement of the clutch 21. causes the eccentric to be brief, is sutficient to enablethe reader to gaina'general ld'eaof the'st'apling machine,

'and attention is now directed to the lasting attachment which constitutes the invention. The sole '28 of a shoe to he lasted is temporairily secured to a Wooden last 29 (Figs. 3 and 6'), an upper 30 (consisting of 'a lining and upper leather) being so'app'li'ed to the last that the marginal portion extends well out upon the channel flange '31. The

"channel flange is molded into the cross sectidiially concaved shape shown so that it can readily be fitted upon the anvil 32 by anyappropria'te means, particularly by the insole flange molding machine disclosed in one of'tlie'copending applications above referred'to. l

Stapl'es are inserted through the {upper 30ai1'd'flange'3l by'the'acti'on of the driver '27. The staples providetemporary fastenmeans for the upper upon the channel flange. But in inserting the staples it is necessary to drawthe upper 30 tightly upon the last 29 and 'in order that this may be done substantially simultaneously with the driving operation provision is made of a pair oflastilig fingers 3 3and 34, a divider 35 [and fold controller '36.

.Upon placing thefi'ange 31 upon theanan '32'the operatorsees-to it that the marginal portion of the up per 30 erttends over the lasting fingers'33 and as shown in Figures 3 and 4. The divider 35 passes down into the space between the lasting ti'ngers 33 and '34- stretching the upper 30 tightly (Fig. 7) forming 'itolds or *puckers upon the lasting fingers, theieby taking up all slack in the upper. The lastihg'lingers are nowyieldably mountedpandthe, yielding of the lasting fingers (compare 'full and dotted line positions in Fig. 6) occurs 'when the divider'35 passes down inthe operation The divider and the'lasting fingersin combination exercise" a function upon the upper to draw the upper tightly over the last 29. This functionis'accentuated by the controller 36 which jams down upon-the upper in front '01" the'staple guide 37, in'suring close contact of the upper with the channel flange 31.

A bl'ock 38-provides a support upon'which the lasting fingers 33 and'34rare mounted for individual pivotal movement at 39. Springs a0 and 41. attached to the shanks "42 and 413 of the'lastin g angels-pun the 'tial.

the channel flange 31. is formed into the shape illustrated by a particular process, and the formation given shanks down upon a stop M'tothei'eby main tain a normal relationship of the lasting fingers with the divider 35. But the stop l i-is adjustableat 415 so that the position of the lasting fingers in respect to the divider can b'ealtered (see Fig. 9) thereby causing a more pronounced stretching oi the upper when the divider advances between the lasting fingers, presuming that the adjustment has been such as to bring the lastii'ig'fingers closer to the divider.

A further adjustment otthe lasting iingers 33 and PM permits regiilatingthe p'osi tion thereof in res'pectto th'e'anvil 3E2. 'lhis adjustment is made through the block 38 and comprises a slot 4-6 in the anvil support 47 (Fig. through which slot on'c'or more niachinescrews 4-8 pass into the block to hold the block inthe desired position in the recess 49 provided in'the'suppo'rt.

A slender rod 50 passes through thelasting fingers 33 and PA and 8) and carries knurled nuts 51 on the threaded ends so that adjustment of the tension ofsprings 52 may be made. The springs pro-ride for any necessary yielding of the lasting 'fingersyand inasmuch as the lasting fingers'are mounted for independent. pi votal moti on 5 the yielding function 'therciit be'conies differen- One lasting linger may yield i'no're than the other according to "circmnstanc'es that 'ii'ia'y arise in theo'p'eration 'o'f'the machine.

Anadjustinent is also provided for the fold controller This element is composed of a metallic plate (Fig. '5) which is appropriately bent at the lower end to assume a proper relationship with'the staple guide 37, the greater part of the plate being slotted at 58 to receive a pai'ref screws 54 which, upon being loosened, permit up and down movement of'the fold controller so thatthe lower edgeprojects mere 'or le'ss beyond the extremity of the staple guide. The eXtent to "which the fold controller jams the upper 30 into the outer corner of the-channel flange 2-31 depends upon the amount'ot adjustment of the controller beyond the staple guide.

The operation 'niay be briefly reviewed to advantage. The last 29 (Figs. Ziand 6) is composed of weed and has afichlinneled insole QS te'nipOrarily tacked thereto: 51; he

upper 30 is appli'ed on top of the last the margin being ample 'toextend'well beyond. This channel flange the channel flange makes it easy to insert it upon the-anvil 32 of the stapling machine. hen thus applying the channel flange the operatersees to it thatthe margin of the upper '30 "rests np'on the pair at lasting fingers 3-3and 34 asshownin Figures 3 andl.

The machine is now operated to drive the staple, and when thus operated assumes the position in Figure 6. The rocker 14 moves down toward the anvil 32 and in doing so, the divider 35 presses that part of the upper which rests upon the lasting fingers down into the space between the lasting fingers (Fig.7) thereby not only taking up some of the looseness in this part of the upper but by virtue of the fact that the lasting fingers are yieldably mounted, causing the stretching of the upper downwardly over the toe of the last. The edges of the divider 3:") grip the upper at the sides of the lasting lingers (Fig. 7) and in moving down cause a stretching of the upper as stated.

At the same time that this happens the fold controller 36 jams down upon the upper and assists the foregoing stretching action. The various actions occur substantially multaneously, the total effect being to stretch the upper tightly and at the same time form a fold in the marginal portion to take up all slack. The climax of one operation occurs when the staple is driven through the upper and into the channel flange 31. The rocker 141: is permitted to raise, whereupon the shoe is moved a little farther and the foregoing operation is repeated. The stapling operation on one shoe having been completed finds the slack in the upper taken up by a series of folds, the upper being drawn tightly down upon the last so that no puckers or looseness whatever appears.

While the construction and arrangement of the improved lasting attachment is that of a generally preferred form, obviously modifications and changes may be made without departing from the spirit of the invention or the scope of the claims.

I claim l. A lasting attachment for a stapling machine having a staple guide, said lasting attachment comprising spaced apart means upon which the margin of an upper is rested preparatory to stapling, means which move with the staple guide to press the marginal upper between and into gripping engagement with said spaced apart means, and means permitting yielding of said spaced apart means in the direction of n'iovement of the staple guide causing a pull on the upper over a last by which it is carried.

2. A lasting attachment for a stapling machine having staple guide, said lasting attachment comprising spaced apart means upon which the margin of an upper is rested preparatory to stapling, means which move with the staple guide to press the marginal upper between. and into gripping engagement with said spaced apart means, means permitting yielding of said spaced apart means in the direction of movement of the staple uide causing a pull on the upper over a last by which it is carried, means also moving with the staple guide to jam the upper against the flange of a sole upon said last, thus assisting the pulling action.

3. A lasting attachn'ient for astapling machine having a staple guide, said lasting attachment conuirising spaced apart means upon which the margin of an upper is rested, means located behind the staple guide moving with the staple guide in the stapling operation to press the marginal upper between said spaced apartmeans tiroducing folds and securing a grip upon the upper to stretch it tightly over a last by which it is carried, means yieldably supportingsaid spaced apart means permitting move ment thereof with. and in, the direction of movement of said staple guide thereby to exercise said stretching function, and means located in front of said staple guideinupinging upon the upper close to a sole upon said last thereby augmenting the stretching function.

4. In a machine for working an upper over a last, means normally situated to re ceive the margin of an upper when laid thereupon, means which advances upon the marginal upper and presses the marginal upper in respect to said receiving means, thereby to make folds in said marginal upper and take up slack therein, and a mounting for said receiving means so arranged that the receiving means can yield in the direction of pressing movement thereby causing a stretching of the upper upon the last in addition to taking up slack.

5. In a machine for working an upper over a last, a plurality of lasting fingers upon which the margin of an upper is rested, means to advance upon the marginal upper and toward said lasting fingers carrying the marginal upper therewith and producing folds upon said lasting fingers thereby taking up slack, means providing an independcut but yieldable mounting for the lasting fingers, permitting a differential motion' of the lasting fingers should circumstances so require, and means keeping the lasting fingers under tension tending to resist said differential motion.

6. In a machine of the character described, a plurality of lasting fingers so situated that the margin of an upper can berested thereupon, means which is normally stationary and in such predetermined normal relation ship with the lasting fingers that the marginal upper may be placed in said position but which means is movable to press the over a last, a plurality of lasting fingers initially in position to receive the margin of an upper, means normally stationary above the lasting fingers, hut movaiole to press the marginal upper toward and between the lasting lingers to form folds, means to adjust the lasting fingers upand down in respect to the presser means thereby to alter the fullness of the folds when made by the presser means, and means to adjust the lasting lingers longitudinally in respect to the presser nieans thereby to alter' the length of the folds.

8. In a machii-ie for working an upper over a last, a plurality of lasting finger-sin position to receive the mar-gin of an upper, means Which has an invarn ble zone of movement to press the marginal upper toward said lasting -lingers thereby to form folds, and means providing for adjustments of the lasting fingers in a plurality of directions either singly or in combination and in respect to said presser means while n an initial positron thereby producing predetermined variations in the formation of said i'olds.

9. In a machine for Working an upper over a last, a plurality of lasting fingers, mean-s upon which they have common mounting but upon which they are capable of independent pivotal motion, means including springs attached to each lasting linger against the tension of which springs the independent pivotal motion mus-t heexerted, means to press a marginal upper initially super-imposed upon said lasting fingers toward and between said lasting fingers thereby causing said pivotal motion which 'heconies variable should there be any variation inthe thickness of the upper upon said lasting fingers, and stationaryhut adjustable means against which said resilient means acts to maintain the lasting fingers in the initial position in respect to the presser means, the variable function. of said lasting fingers ioeing operative regardless of the particular adjustment of said means.

ADAM PRENZELQ 

